This "Pencil" profile Chrome lined barrel is the same size and finish as the original AR-15, XM16E1, M16 and M16A1 models.
If you are looking for a Military quality Pencil profile 20" barrel for your Retro build.. or want a Light Weight Barrel for your modern build then this is one of the nicest barrels available. Fully Chrome Lined and choice of twist rate.
Twist Rate Choice: 1/7 .. 1/12 .. 1/14
.625 at the FSB/Gas Block location
A1 Round Front Sight Post and assembly
Early Flat Style Straight "Slip Ring" (Later Delta Ring available on request)
Gas Tube & Pin
Barrel Shim (just in case it is needed for Barrel Nut timing, taper pins do not need to be removed to install)
1 lbs. 11 oz.
Notes on Options:
Twist rate mostly affects what types of bullets you can use and your level of Purism:
- 1:14 is what ArmaLite started with in the late 50's and were used for the first 601's. Replaced by 1:12 in about 1962.
- 1:12 what was issued in all AR15 variants from 1962-1984 (Marines) and 1987 by the US Army. Use only 55gr and some 62gr bullets.
- 1:7 can shoot anything you can buy, including 77gr heavies (mk262) and tracers. It is the current NATO Standard twist rate.